CVE-2022-2962
First published: Tue Aug 23 2022(Updated: )
A DMA reentrancy issue was found in the Tulip device emulation in QEMU. When Tulip reads or writes to the rx/tx descriptor or copies the rx/tx frame, it doesn't check whether the destination address is its own MMIO address. This can cause the device to trigger MMIO handlers multiple times, possibly leading to a stack or heap overflow. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/qemu | <7.2.0 | 7.2.0 |
| QEMU KVM | >=4.2.0<=7.1.0 | |
| debian/qemu | 1:5.2+dfsg-11+deb11u3 1:5.2+dfsg-11+deb11u2 1:7.2+dfsg-7+deb12u12 1:9.2.0+ds-5 1:9.2.1+ds-1 |
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Reference Links
- https://gitlab.com/qemu-project/qemu/-/commit/36a894aeb64a2e02871016da1c37d4a4ca109182
- https://gitlab.com/qemu-project/qemu/-/issues/1171
- https://launchpad.net/bugs/cve/CVE-2022-2962
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2120641
- https://lists.nongnu.org/archive/html/qemu-devel/2022-08/msg03033.html
- https://access.redhat.com/security/cve/cve-2022-2962
- https://gitlab.com/qemu-project/qemu/-/commit/36a894ae
- https://bugzilla.redhat.com/show_bug.cgi?id=2120631
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2962
- https://nvd.nist.gov/vuln/detail/CVE-2022-2962
- https://security-tracker.debian.org/tracker/CVE-2022-2962
- https://ubuntu.com/security/CVE-2022-2962
- https://gitlab.com/qemu-project/qemu/-/commit/398f9a84ac7132e38caf7b066273734b3bf619ff
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2022-2962.
What is the severity of CVE-2022-2962?
The severity of CVE-2022-2962 is high with a CVSS score of 7.8.
What is the affected software?
The affected software includes QEMU versions 1:7.0+dfsg-7ubuntu2.1, 7.2.0, and versions between 4.2.0 and 7.1.0, as well as various Debian versions.
How does the vulnerability in Tulip device emulation in QEMU manifest?
The vulnerability in Tulip device emulation in QEMU allows the device to trigger MMIO handlers multiple times, potentially leading to arbitrary code execution or denial of service.
Are there any references for more information about CVE-2022-2962?
Yes, you can find more information about CVE-2022-2962 at the following references: [Link 1](https://gitlab.com/qemu-project/qemu/-/commit/36a894aeb64a2e02871016da1c37d4a4ca109182), [Link 2](https://gitlab.com/qemu-project/qemu/-/issues/1171), [Link 3](https://launchpad.net/bugs/cve/CVE-2022-2962).
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